After talks held on Tuesday by the Scottish Football Association's Professional Game Board between the Scottish Premier League and SFL board members, the SFL committed to make clear their decision in the same week as their SPL counterparts.
SPL clubs will hold their vote on April 15, with the votes of 11 out of 12 top-flight teams needed to approve reconstruction plans which include the proposed 12-12-18 structure, which would split into 8-8-8-18 after 22 games.
In the SFL, 22 out of 29 eligible sides must vote in favour of plans, which also include a merger which would leave one ruling body and the change in the financial distribution model.
An SFA statement read: "The Scottish FA today facilitated a special meeting of the Professional Game Board at Hampden Park to establish both the current position and next steps from the Scottish Premier League and Scottish Football League in relation to the ongoing league reconstruction process.
"At the meeting - which also included representation from the SPL and SFL board of directors - a number of issues were debated openly in order to provide clarification and certainty on a number of issues that arose following the SFL members' meeting on March 28.
"Following today's discussions, there is now a commitment by the Scottish Football League to vote on the reconstruction proposals no later than Friday, April 19, with the Scottish Premier League committed to voting on the proposals on Monday, April 15.
"The Scottish FA's position on league reconstruction is clear: Scottish football requires urgent, radical change in its league structures as a first, essential step to rejuvenating the national game.
"To that end, in order to provide greater comfort to both sides, we have agreed to undertake a period of due diligence on behalf of both the SPL and SFL to provide independent verification of projected distributable revenue of any single league body."
A meeting last week at Hampden between the SPL clubs reportedly ended in an informal 14-14 vote, thus casting doubt on the success of the proposals
Dunfermline, who moved into interim administration last week, were not present, while Rangers do not have a vote because of their associate member status.
Earlier on Tuesday, a survey commissioned by the Scottish Football Association revealed the vast majority of supporters in Scotland were against the the league reconstruction proposal as they wanted a bigger top flight.
Around 7,000 fans were polled for the first-ever Scottish National Football Survey, with 87 per cent of respondents claiming they want to see a top division made up of more teams than the Scottish Premier League's current 12 members.
That flies in the face of SPL plans for a 12-12-18 set-up.
Fans also say they want to see no more than three divisions and have argued for the SPL and Scottish Football League to be merged into one body.
In a statement released on Tuesday night, Rangers chief executive Charles Green said the league reconstruction had turned into "something of a fiasco" and said the fans should be listened to.
He said on his club's website: "Today the SFA released results of a major survey which made it clear fans want to see an expanded top division and no more than three tiers.
"That is entirely consistent with my earlier proposal for 14-14-14 set up which is no more complicated than what is being currently proposed by the SPL.
"In fact, their notion of two divisions of 12 fragmenting into three of eight is more convoluted and isn't something which appeals greatly to many of our clubs. Yet, if they vote this in they'll be doing it out of fear of being left with the status quo because they have been told constantly no other option can work.
"That's simply not true and it is comforting to know the fans can see that.
"Look, we are all agreed we must have change but it must be the correct change and it must be for the greater good of the game. It must not be for the few.
"That's why the findings of this first ever Scottish National Football Survey shouldn't be dismissed with mere platitudes. If the clubs are really listening to their fans they will act accordingly and do what is right.
"No matter what anyone says the current proposals will not give the fans what they are demanding."